Touch emulator: enables double tap support for pages similar to Chrome on Android.

content/browser/renderer_host/input/touch_emulator_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/time/time.h"
@@ skipping 35 matching lines @@
 
   // testing::Test
   void SetUp() override {
 #if defined(USE_AURA)
     aura::Env::CreateInstance(true);
     screen_.reset(aura::TestScreen::Create(gfx::Size()));
     gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE, screen_.get());
 #endif
 
     emulator_.reset(new TouchEmulator(this));
+    emulator_->SetDoubleTapSupportForPageEnabled(false);
     emulator_->Enable(ui::GestureProviderConfigType::GENERIC_MOBILE);
   }
 
   void TearDown() override {
     emulator_->Disable();
     EXPECT_EQ("", ExpectedEvents());
 
 #if defined(USE_AURA)
     aura::Env::DeleteInstance();
     gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE, nullptr);
@@ skipping 210 matching lines @@
   EXPECT_EQ("", ExpectedEvents());
   MouseDown(100, 200);
   EXPECT_EQ("TouchStart GestureTapDown", ExpectedEvents());
   MouseUp(200, 200);
   EXPECT_EQ(
       "TouchMove GestureTapCancel GestureScrollBegin GestureScrollUpdate"
       " TouchEnd GestureScrollEnd",
       ExpectedEvents());
 }
 
+TEST_F(TouchEmulatorTest, DoubleTapSupport) {
+  emulator()->SetDoubleTapSupportForPageEnabled(true);
+  MouseMove(100, 200);
+  EXPECT_EQ("", ExpectedEvents());
+  MouseDown(100, 200);
+  EXPECT_EQ("TouchStart GestureTapDown", ExpectedEvents());
+  MouseUp(100, 200);
+  EXPECT_EQ("TouchEnd GestureTapUnconfirmed", ExpectedEvents());
+  MouseDown(100, 200);
+  EXPECT_EQ("TouchStart GestureTapCancel GestureTapDown", ExpectedEvents());
+  MouseUp(100, 200);
+  EXPECT_EQ("TouchEnd GestureTapCancel GestureDoubleTap", ExpectedEvents());
+}
+
 TEST_F(TouchEmulatorTest, MultipleTouches) {
   MouseMove(100, 200);
   EXPECT_EQ("", ExpectedEvents());
   MouseDown(100, 200);
   EXPECT_EQ("TouchStart GestureTapDown", ExpectedEvents());
   MouseUp(200, 200);
   EXPECT_EQ(
       "TouchMove GestureTapCancel GestureScrollBegin GestureScrollUpdate"
       " TouchEnd GestureScrollEnd",
       ExpectedEvents());
@@ skipping 258 matching lines @@
 
 TEST_F(TouchEmulatorTest, CancelAfterDisableDoesNotCrash) {
   DisableSynchronousTouchAck();
   MouseDown(100, 200);
   emulator()->Disable();
   EXPECT_EQ("TouchStart TouchCancel", ExpectedEvents());
   emulator()->CancelTouch();
 }
 
 }  // namespace content